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Motorola MB8611 DOCSIS 3.1 Cable Modem (2.5 Gbps Ethernet Port) Expired

$136
$169.99
+ Free S/H
+20 Deal Score
20,151 Views
MTRLC LLC via Amazon has Motorola MB8611 DOCSIS 3.1 Cable Modem (2.5 Gbps Ethernet Port) on sale for $135.99. Shipping is free.

Thanks to community member guruguru for finding this deal

Note, must be sold by MTRLC LLC and fulfilled by Amazon

About the Product
  • Works w/ Comcast Xfinity, Comcast Business, Cox Communications, Charter Spectrum and other US services providers
  • Pairs w/ any WiFi router to connect all your devices
  • This version features a 2.5 Gbps Ethernet port (other models has only 1 Gbps Ethernet port)
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Edited June 21, 2021 at 09:24 AM by
$136
Motorola MB8611 DOCSIS 3.1 Cable Modem, 6 Gbps Max Speed

https://smile.amazon.com/dp/B08DDFKXKC

Last FP deal was $130

https://smile.amazon.com/dp/B08DD...yp_imgToDp
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Model: Motorola Ultra-Fast DOCSIS 3.1 Cable Modem with 32X8 DOCSIS 3.0 & 2.5Gbps Ethernet (MB8611)

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I also needed to upgrade my modem for gigabit internet, and after researching the various options, I went with this deal today. This and the CM2000 have essentially the same feature sets, and so for ~$65 cheaper and a larger body for better heat dispersion, this was my clear choice. Though you have a Netgear Nighthawk router, you need not get a Nighthawk branded modem - other than perhaps aesthetic uniformity, it confers no additional benefit over a similarly featured device.
·
Buy them separate for max performance, together if you want to spend less, have less complexity, but get less performance. A combo is never going to match a separate router and modem.
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Joined Dec 2014
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> bubble2 37 Posts
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DFA_Havoc
06-21-2021 at 09:51 AM.
06-21-2021 at 09:51 AM.
Quote from spochuck :
This or Netgear CM2000 for $199 ($50 off on Amazon)

For reference, I have a Netgear Nighthawk router (not sure if that helps or not). Upgrading from older Arris. Have the fastest internet plan Comcast offers.

Seems to be an opinion across the board on these, the motorola, Arris 8200s, etc.
Anecdotal, but I just moved into a new place and had to get Comcast (ugh) as it's the only real option here. I bought a brand new Motorola MB8611 based on the research I did, but the connection was constantly dropping. Technician came out and tested our lines, they couldn't figure out what the problem was. Finally, in an attempt to rule out hardware as a possible culprit, I returned the MB8611 and picked up a CM2000 instead. Connection has been rock solid ever since.

I dunno if I just got a lemon or what, but I have directly compared the two options you're asking about, and the Motorola turned out to be the cause of my connection woes.
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Joined Sep 2005
L3: Novice
> bubble2 263 Posts
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supermonker007
06-21-2021 at 09:58 AM.
06-21-2021 at 09:58 AM.
Quote from Nawert :
I'm a noob with this stuff but my friend has xfinity and his wifi doesn't reach across the house. Any suggestions on what equipment he should buy? 2 routers and have one as a repeater wired from the main router?
Quote from hataz :
If he is using the xFinity equipment, first would be get ride of it, its crap and the wifi on their devices is horrible. To answer your question, yes, what you mentioned is one was to do it and honestly best, since wired between each routers make sure throughout put is best on the repeater.
I recently upgrade my xfinity service to gigabit which required a new modem. After some back and forth and comparing this exact same modem (MB8611) vs. the xFi gateway, performance was pretty much the same, plus, using the xFi modem allowed for no data cap AND they weren't charging me the rental fee for 12 months.

Wifi was terrible on the xFi so I simply used my existing mesh system and put the xFi gateway in bridge mode.


TLDR; If you can get the xFi gateway for free, just use it, it works fine. Otherwise, MB8611 is great.
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Joined Dec 2013
L5: Journeyman
> bubble2 607 Posts
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alaindesjardins
06-21-2021 at 10:43 AM.
06-21-2021 at 10:43 AM.
Spectrum has GiG internet in my area but they provide their own modem. I figured I could get this modem since I read the base is removeable and the modem can lay flat on vented cantilever shelf in my network rack. I also like the single 2.5g port which would interface with my UniFi Dread Machine very well.

I was also hoping it would make their "install" less intrusive since they require to come into the house to install their equipment and I don't want that. Maybe I can convince them to not charge me $200 for an install if I already have an approved modem for their service?

I'm hoping someone can help me reason since I'm on the fence about it.
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Joined Mar 2011
L3: Novice
> bubble2 226 Posts
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dealingstealing
06-21-2021 at 01:46 PM.
06-21-2021 at 01:46 PM.
Seller isn't Amazon, but is prime eligible.
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Joined Nov 2014
L4: Apprentice
> bubble2 376 Posts
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EugeneV2252
06-21-2021 at 02:35 PM.
06-21-2021 at 02:35 PM.
what's the comparison here: arris s33 vs. mb8611 vs. netgear 2000?
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Joined Dec 2007
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> bubble2 212 Posts
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letshavepaneer
06-21-2021 at 02:55 PM.
06-21-2021 at 02:55 PM.
If I have a 8x4 modem right now, that theoretically supports 343mbps max.. and I'm only paying for 300 megabit down and 35 mbps up, is there any benefit in upgrading for stability purposes?

Does more channels result in more stability and reliability somehow, or does it not work like that?
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Joined Mar 2015
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> bubble2 790 Posts
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jacksan1
06-21-2021 at 03:33 PM.
06-21-2021 at 03:33 PM.
Quote from letshavepaneer :
If I have a 8x4 modem right now, that theoretically supports 343mbps max.. and I'm only paying for 300 megabit down and 35 mbps up, is there any benefit in upgrading for stability purposes?

Does more channels result in more stability and reliability somehow, or does it not work like that?
No, I don't think so. If you are not going for the speed, e.g , 1 Gig service, this modem will not give you anything more than a DOCSIS 3.0 modem.
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Joined Nov 2018
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> bubble2 3 Posts
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PurplePassenger5783
06-22-2021 at 03:12 AM.
06-22-2021 at 03:12 AM.
Quote from pre0 :
I've heard DOCSIS 3.1 and Moca use the same frequencies, will this play nice with my gocoax moca adapters? Does any one have any experience with the two?
Hey, so I think you need to find what frequencies your ISP uses for docsis 3.1

Then your moca (I'm guess you have maco 2.0) modems should be configurable to use a frequency that doesn't clash as much.

You can also look into moca filters that you install at the demarc into your home/apartment to filter out noise, but not sure whats available for the docsis3.1 frequencies.
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Joined Mar 2021
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> bubble2 56 Posts
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FairEducation545
06-22-2021 at 05:02 AM.
06-22-2021 at 05:02 AM.
Quote from RGon :
... Ok so, this has a "max speed" of 6Gbps but the Ethernet port only goes up to 2.5Gbps. wtf?

There is one open and two / three masked Ethernet ports on this modem. All ports can be bonded for a max of 6gbps speed - when available
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Joined Aug 2014
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CharlesB1478
06-22-2021 at 05:03 AM.
06-22-2021 at 05:03 AM.
Quote from Nawert :
I'm a noob with this stuff but my friend has xfinity and his wifi doesn't reach across the house. Any suggestions on what equipment he should buy? 2 routers and have one as a repeater wired from the main router?
How is the speed coming into the house if you connect via Ethernet directly to the modem and run a speed test on speedtest.net or similar? I assume the modem is from Xfinity and that this is a cable modem and wifi router combo?. If that's as expected, then it sounds like wifi alone is the issue. If that's the case, then the easiest approach might be to buy a mesh wifi kit (multiple access points that link together). You can then likely disable the wifi on the Xfinity device and just use that device as a cable modem. The ideal would be to run CAT6 between devices.

Note that you could also use a second router if hardwired to the first. You'd go from the the Xfinity device to the upstream WAN port of the second router. Ideally the second router will have some sort of access point mode that you can choose during setup. This will be beneficial otherwise devices connected to one router or the other won't see each across the network.
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